Question: Why does hair go gray?
Answer: Gray hair, as most people know, is strongly associated with the natural aging process. Hair colour comes from cells located in the root of each hair and as people age the pigmentation begins to slow down. The process of going gray is genetically predetermined and this slow process stops at gray for some people but moves on to white for others. White hair basically signals that no pigment remains to colour the hair. Despite common folklore there is no evidence that stress causes gray hair.